Step Response of Rectifier DC Current Controller and Inverter DC Current-Voltage-Extinction Angle Controllers in a Current Source Converter based HVDC Transmission Link Connected to a Weak Inverter Side AC System
Keywords:
HVDC transmission systems, Weak AC system, Rectifier DC Current Control, Inverter DC Current-Voltage-Extinction angle Control, Step response.Abstract
Transmission of electrical energy with High Voltage Direct Current (HVDC) has provided the electric power industry with a dominant means to transmit a huge quantity of electricity over very long distances. To investigate the performance, a well-developed current source converter based HVDC transmission system model is projected, in which the AC system is represented as damped LLR equivalent and is equipped with a double-tuned harmonic filter to mitigate the AC-DC harmonics, and the DC system is secured with a rectifier current control, inverter current control, inverter voltage control and inverter extinction angle control. The MATLAB/Simulink-based simulation results validate the step response of the HVDC transmission link connected to a weak AC system with various controllers.
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